Let's take a look at a study recently done in Philadelphia, a city which is in a similar situation.
Philly has four major casinos and there has been fierce opposition to expanding that number, including a proposed law in the state legislature that would have required casinos to inform each gambler of his monthly winnings and losings (it failed by two votes) and increased measures to treat compulsive gamblers.

Leading the anti-casino charge is a not-for-profit group called Casino-Free Philadelphia. Last month they issued a report called "Snake Eyes: All Odds Are Against the Philly Casinos," detailing casino failures elsewhere in Pennsylvania.

The report draws concerned residents' attention to "market saturation" in the Philadelphia area and beyond. Both Chester City in Delaware County and Bensalem Township in Bucks County are home to casinos that will likely continue to draw many gamblers from the suburbs and the outskirts of the city. That may not leave sufficient gamblers to provide revenues to Philadelphia's new facilities.

Casinos in other areas of the state have experienced their own problems with market saturation. The state expected Rivers Casino in Pittsburgh, for instance, to take in $265 per day per slots machine, although the establishment is now taking in an average of about half that much.

"The writing is on the wall for these casinos," Jethro Heiko, a founding member of Casino-Free Philadelphia, said in a statement. "The market and the economy are working against casinos all over the country, but here in Philadelphia casinos face an even bigger competitive disadvantage. Here they will face protests, de-propagandizing and consistent opposition from the people of Philadelphia."